Zirconium Oxide-Based Compound as New Cathode Without Platinum Group Metals for PEFC
Zirconium Oxide-Based Compound as New Cathode Without Platinum Group Metals for PEFC
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DOI：
10.1149/1.3382960
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发表时间：
2010-01-01
影响因子：
3.9
通讯作者：
Ota, K.
中科院分区：
文献类型：
--
作者：
Ohgi, Y.;Ishihara, A.;Ota, K.
部分氧化碳氮化锆 (Zr-CNO) 粉末作为聚合物电解质燃料电池 (PEFC) 的非贵金属阴极进行了评估。以碳氮化锆(ZrC0.5N0.5)为原料，在含有2%H-2和0.25%O-2气体的N-2气氛下，在1000-1400℃下进行热处理，制备Zr-CNO粉末。通过伏安法评价其在30℃、0.1 mol dm(-3) H2SO4中氮气和氧气条件下对氧还原反应(ORR)的催化活性。 C. 虽然未处理的 ZrC0.5N0.5 的 ORR 起始电位相对于可逆氢电极 (RHE) 为 0.55 V，但适当氧化的 Zr-CNO 的起始电位达到 0.97 V 相对于 RHE。 X射线衍射和X射线光电子能谱数据表明Zr-CNO表面被氧化为ZrO2，而ZrC0.5N0.5保留在Zr-CNO颗粒的内部。 (C) 2010 年电化学协会。 [DOI：10.1149/1.3382960] 保留所有权利。
Partially oxidized zirconium carbonitride (Zr-CNO) powders were evaluated as a nonprecious metal cathode for polymer electrolyte fuel cells (PEFCs). Zr-CNO powders were prepared from zirconium carbonitrides (ZrC0.5N0.5) with heat-treatment under N-2 containing 2% H-2 and 0.25% O-2 gas at 1000-1400 degrees C. Voltammetry was performed to evaluate the catalytic activity for oxygen reduction reaction (ORR) under nitrogen and oxygen in 0.1 mol dm(-3) H2SO4 at 30 degrees C. Although the onset potential of the ORR for untreated ZrC0.5N0.5 was 0.55 V vs a reversible hydrogen electrode (RHE), the onset potential of the appropriate oxidized Zr-CNO reached 0.97 V vs RHE. X-ray diffraction and X-ray photoelectron spectroscopy data suggested that the surface of Zr-CNO was oxidized to ZrO2, and ZrC0.5N0.5 remained in the inner part of the Zr-CNO particles. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3382960] All rights reserved.